What is Base64 decoding?

Base64 decoding is the reverse process of Base64 encoding - it converts Base64-encoded text strings back into their original binary format (files, images, documents, etc.). When you receive Base64-encoded data from an API, database, or email, you need to decode it to restore the original file. This process is essential for retrieving files that were previously encoded for text-based transmission or storage, allowing you to download and use them in their native format.

Tool Description

This tool provides a simple, focused way to convert Base64 encoded strings back into downloadable files. Simply paste your Base64 string (with or without data URL prefix), and the tool automatically detects the file type, validates the data, and allows you to download the decoded file. It handles both pure Base64 strings and complete data URLs with MIME type information, making it perfect for quickly recovering files from Base64 representations.

Features

  • Base64 String Input: Paste any Base64 encoded string
  • Data URL Support: Automatically handles complete data URLs (data:image/png;base64,...)
  • Automatic File Type Detection: Identifies file type using magic numbers even without data URL prefix

Supported File Types

The tool can decode Base64 strings to any file type, with automatic detection for:

  • Images: JPEG, PNG, GIF, WebP, SVG, BMP, ICO
  • Documents: PDF, TXT, JSON, XML, CSV
  • Videos: MP4, AVI, MOV, WebM, MKV
  • Audio: MP3, WAV, OGG, M4A, FLAC
  • Fonts: TTF, WOFF, WOFF2, OTF, EOT
  • Archives: ZIP, RAR, 7Z
  • Any binary file: The tool handles all Base64 encoded data universally